Ardonna should only call her own bats 'my pet'.

It's possible, however unlikely, for none of Ardonna's bats to have died before killing the hostile bats in 'Following the Shadow'.
In such a case, when the 'You can now raise bat corpses!' event triggers, Ardonna will still refer to the enemy bat as her 'pet' so add this condition to avoid it.

data/campaigns/Secrets_of_the_Ancients/utils/sota-utils.cfg

@@ -362,6 +362,13 @@
                 name=zombies[0].allow_recruit
                 boolean_equals=no
             [/variable]
+            [and]
+                # Only makes sense for Ardonna to call her own bats 'my pet'.
+                [variable]
+                    name=side
+                    equals=1
+                [/variable]
+            [/and]
         [/filter_condition]
         [message]
             speaker=Ardonna